The company's predecessor, Yunnan Lancang Lead Mine, established an old factory in Lancang County with the approval of the State Council in 1955 1. After 57 years of construction and development, especially during the Eleventh Five-Year Plan period, the company has become the largest non-ferrous metal mining and smelting enterprise in southwest Yunnan. By the end of 20 1 1, the total assets of the company were 890 million yuan, and the enterprise occupied an area of 930 hectares. The annual production capacity of the enterprise is 400,000 tons of lead-zinc ore dressing, 360,000 tons of lead-zinc ore dressing, 20,000 tons of electrolytic zinc, 20,000 tons of electrolytic lead, 30 tons of silver, electric furnace zinc powder 1 10,000 tons, zinc oxide powder 2,000 tons and lignite10.2 million tons. The enterprise currently has 18 19 employees, including 459 employees with bachelor degree or above, 440 senior and intermediate professional technicians (including 9 senior professional titles and 0 national registered safety engineer 10), and 909 workers with middle and advanced technical levels.